3Com 3012 Command Reference Manual page 66

3Com Router Command Reference Guide Addendum for V1.2
authentication-type command, you can disable the login authentication mode for the
user, in which case the user will be unable to log into the system.
By default, no login authentication mode is specified, that is, the user is unable to log
into the system.
You must specify an authentication mode for a new user, otherwise, the user will be
unable to log into to the system. The authentication mode set for the new user will
take effect the next time when the user log into the system.
For related command, see display ssh user-information.
Example
Set the authentication mode to password for the user smith.
[3Com] ssh user smith authentication-type password
[3Com]
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